Upgrade your spring-powered Gamo air rifle to a smooth, vibration-free nitrogen gas system. This premium 60kg, maintenance-free Gas Ram kit directly replaces Gamo OEM part 35450. • Fits popular models: Whisper, Big Cat, Swarm, & Bull Whisper • Designed for Gamo plastic CAT and SAT trigger systems • Fits both .177 and .22 calibres • Increases power, consistency, and shot-to-shot accuracy • Easy drop-in installation with no modifications required